/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright held by original author
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 2 of the License, or (at your
    option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM; if not, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Class
    Foam::outletInletBackflowFvPatchField

Description
    Similiar to the outletInlet backflow, expect that it uses the velocity
    component normal to the patch as indication. Furthermore it marks all faces
    with less than SMALL normal velocity already as backflow faces.

SourceFiles
    outletInletBackflowFvPatchField.C

\*---------------------------------------------------------------------------*/

#ifndef outletInletBackflowFvPatchField_H
#define outletInletBackflowFvPatchField_H

#include "mixedFvPatchField.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
                     Class outletInletBackflowFvPatch Declaration
\*---------------------------------------------------------------------------*/

template<class Type>
class outletInletBackflowFvPatchField
:
    public mixedFvPatchField<Type>
{

public:

    //- Runtime type information
    TypeName("outletInletBackflow");


    // Constructors

        //- Construct from patch and internal field
        outletInletBackflowFvPatchField
        (
            const fvPatch&,
            const DimensionedField<Type, volMesh>&
        );

        //- Construct from patch, internal field and dictionary
        outletInletBackflowFvPatchField
        (
            const fvPatch&,
            const DimensionedField<Type, volMesh>&,
            const dictionary&
        );

        //- Construct by mapping given outletInletBackflowFvPatchField onto a new patch
        outletInletBackflowFvPatchField
        (
            const outletInletBackflowFvPatchField<Type>&,
            const fvPatch&,
            const DimensionedField<Type, volMesh>&,
            const fvPatchFieldMapper&
        );

        //- Construct as copy
        outletInletBackflowFvPatchField
        (
            const outletInletBackflowFvPatchField<Type>&
        );

        //- Construct and return a clone
        virtual tmp<fvPatchField<Type> > clone() const
        {
            return tmp<fvPatchField<Type> >
            (
                new outletInletBackflowFvPatchField<Type>(*this)
            );
        }

        //- Construct as copy setting internal field reference
        outletInletBackflowFvPatchField
        (
            const outletInletBackflowFvPatchField<Type>&,
            const DimensionedField<Type, volMesh>&
        );

        //- Construct and return a clone setting internal field reference
        virtual tmp<fvPatchField<Type> > clone
        (
            const DimensionedField<Type, volMesh>& iF
        ) const
        {
            return tmp<fvPatchField<Type> >
            (
                new outletInletBackflowFvPatchField<Type>(*this, iF)
            );
        }


    // Member functions

        //- Update the coefficients associated with the patch field
        virtual void updateCoeffs();

        //- Write
        virtual void write(Ostream&) const;
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#ifdef NoRepository
#   include "outletInletBackflowFvPatchField.C"
#endif

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //
